Just tried CloneDVD 2.x (as an experiment) because I cannot get my head around all the vob/ifo editing you need to do to do this manually. The only programs I found doing endless searches on google for such an episode-disc split were CloneDVD, DVDFab, and DVD Xcopy Pro (thought this was initially based, 'nicked', from puclic domain freeware?).
Tried DVDFab - this adds the insert disc 1/2 message at the end of the disc, not sure it can cope with 3 discs for putting 3 episode discs to 3 dvd5's), but it has a major problem - it works by title(chapter?) order not episode order (not always right). I posted this query last week - finding it put ep1 and part of ep3 on disc1, and ep2 and 2nd part of ep 3 on disc 2 - useless.
CloneCD does work fine, but it does not add any message as mentioned - just pauses on a black screen for a while (probably can alter this with some freeware packages after CloneDVD does the main work, but you need to know what to do). In the end, splitting an uneven episode dvd to dvd5's was better for me to split to three dvd5's - they are only a backup as a test. Almost everything works afterwards, full menu's with scene selection, but with a 3ep split to 2 dvd5's, or 3 ep to 3 dvd5's, the 'full play' does nothing (probably as expected) just the right episode selection for that disc or scene's (be nice for the full button to have been amended to play what CloneDVD has rebuilt). Still, the holy-grail continues - it cannot be long now before the small changes needed in packages takes place.